\begin{pspicture}(0,0)(10,16.5)
	\input{fig/2d-helpers.tex}
	\put(1,0){  % Gray zig-zag.
		\pspolygon[linestyle=dashed,linecolor=lightgray]
		(5,0.5)(7,0.5)          % Bottom.
		(3.5,4)(7.5,8)(3.5,12)  % Right.
		(8,16.5)(6,16.5)				% Top.
		(1.5,12)(5.5,8)(1.5,4)  % Left.
	}
	\put(0,0){  % Black zig-zag.
		\pspolygon[linestyle=dashed,linecolor=black]
		(5,0.5)(7,0.5)          % Bottom.
		(3.5,4)(7.5,8)(3.5,12)  % Right.
		(8,16.5)(6,16.5)				% Top.
		(1.5,12)(5.5,8)(1.5,4)  % Left.
	}
	\multiput(1,0)(2,0){4}{
		\multiput(0,1)(0,2){7}{%
			% E-field layer.
			\psset{linecolor=lightgray,fillcolor=lightgray}
			\En00z{ez00}
			\En02z{ez02}
			\En22z{ez22}
			\En20z{ez20}
			\En01y{ey01}
			\En21y{ey21}
			\En10x{ex10}
			\En12x{ex12}
			\E{ez00}{ey01} \E{ey01}{ez02} \E{ez02}{ex12} \E{ex12}{ez22}
			\E{ez22}{ey21} \E{ey21}{ez20} \E{ez20}{ex10} \E{ex10}{ez00}
			% H-field layer.
			\psset{linecolor=black}
			\hn11z{hz}
			\hn10y{hy-} \E{hy-}{hz}
			\hn12y{hy+} \E{hy+}{hz}
			\hn01x{hx-} \E{hx-}{hz}
			\hn21x{hx+} \E{hx+}{hz}
		}
	}
	% Top-most half-layer of dots and lines..
	\multiput(1,15)(2,0){4}{
		% E-field layer.
		\psset{linecolor=lightgray,fillcolor=lightgray}
		\En00z{ez00}
		\En20z{ez20}
		\En01y{ey01}
		\En21y{ey21}
		\En10x{ex10}
		\E{ez00}{ey01} \E{ey21}{ez20} \E{ez20}{ex10} \E{ex10}{ez00}
		% H-field layer.
		\psset{linecolor=black}
		\hn11z{hz}
		\hn10y{hy-} \E{hy-}{hz}
		\hn01x{hx-} \E{hx-}{hz}
		\hn21x{hx+} \E{hx+}{hz}

	}
	\Yaxis01{16}\Xaxis190  % Axes.
\end{pspicture}
